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firefox-build-debootstrap.md

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+# Building Firefox in a chroot
+
+Something I don't like is project with tons of build dependencies. They tend to stay and pollute the system. Something I don't like even more are containers.
+
+Let's work with old school chroot.
+
+## Installing dependencies
+
+```
+sudo aptitude install debootstrap schroot
+```
+
+## Installing an image
+
+A recent version of Ubuntu is enough.
+
+```
+sudo debootstrap --variant=buildd arch=amd64 artful /srv/chroot/firefox-chroot http://archive.ubuntu.com/ubuntu/
+```
+
+## Configuring and starting the chroot
+
+```
+cat <<EOF > /etc/schroot/chroot.d/firefox.conf
+[firefox]
+description=Firefox
+directory=/srv/chroot/firefox-chroot
+users=user1
+root-users=user1
+type=directory
+EOF
+```
+
+We need to enable write access to shared memory, else the build configuration tool will fail.
+
+```
+cat <<EOF >> /etc/schroot/default/fstab
+/dev/shm        /dev/shm        none    rw,bind         0       0
+EOF
+```
+
+## Configuring the image
+
+The list of sources is missing some lines, so we must add them before installing dependencies. Moreover, the Firefox bootstrap forget to install Clang.
+
+```
+cat <<EOF >> /srv/chroot/firefox-chroot/etc/apt/sources.list
+deb http://fr.archive.ubuntu.com/ubuntu/ artful-updates main restricted
+deb http://fr.archive.ubuntu.com/ubuntu/ artful universe
+deb http://fr.archive.ubuntu.com/ubuntu/ artful-updates universe
+EOF
+sudo schroot -c firefox
+apt-get update
+apt-get install python clang
+exit
+```
+
+## Starting the chroot
+
+```
+schroot -c firefox
+```
+
+Now you can follow the [official build steps](https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Build_Instructions/Simple_Firefox_build/Linux_and_MacOS_build_preparation).